An explanation for behavior must be and to be considered a scientific theory.
a.
repeated . . recorded
b.
proven . . recorded
c.
testable . . supported
d.
testable . . proven

The correct answer for the blank is C.  testable and supported.

Scientific theories can be described as the explanations of some important feature of nature that are established by collecting facts and observations over time. They are tested repeatedly and verified with the help of scientific method ( with standard protocols).

Thus, an explanation for behavior must be  testable and supported to be considered a scientific theory.

electromagnetic waves travel through space with vacuums. give me brainliest if right.

i think the answer is a, hope this : )